Drought Tolerant Plants: Beautiful Borders That Thrive in Dry Conditions

The UK's summers are changing. Longer dry spells and hosepipe restrictions are becoming a familiar part of the gardening calendar — and it's prompting many gardeners to rethink what they plant. The good news? Some of the most beautiful, long-flowering perennials are also among the most drought tolerant. Once established, these plants ask for very little and give back a great deal.

What Makes a Plant Drought Tolerant?

Drought tolerant plants have evolved strategies to survive with minimal water — deep tap roots that reach moisture far below the surface, silver or grey foliage that reflects heat, or fleshy stems and leaves that store water. Many originate from Mediterranean hillsides, South African grasslands, or the prairies of North America, which is why they tend to thrive in the warmth and free-draining conditions of a sunny UK border.

Our Top Drought Tolerant Perennials

Salvia nemorosa 'Caradonna'

One of the finest salvias available. Deep violet-blue flowers on near-black stems from June to September, with a strong second flush if cut back after the first. Incredibly resilient in dry, sunny spots and a magnet for bees. Combines beautifully with pale Achillea or the warm tones of Echinacea 'Magnus'.

Salvia nemorosa 'Ostfriesland' (East Friesland)

A slightly more compact salvia with rich violet-purple spikes. Flowers earlier than 'Caradonna' and repeat-blooms reliably. Excellent at the front of a border or woven through gravel planting.

Echinacea purpurea 'Magnus'

Large, flat-petalled flowers in deep rose-pink with a prominent orange-brown cone. Flowers from July to September and the seedheads persist through winter, providing structure and bird food. Deep tap roots make it exceptionally drought hardy once established.

Echinacea purpurea 'White Swan'

A cooler, more elegant alternative to the pink forms. Creamy white petals with a golden-green cone. Lovely combined with silver-leaved plants like Stachys or blue Eryngium.

Achillea millefolium 'Cerise Queen'

Flat-topped heads of vivid cerise-pink flowers from June to August. Achillea spreads steadily to fill gaps and is virtually indestructible in dry, sunny conditions. Excellent for cutting and drying.

Achillea 'Moonshine'

Soft sulphur-yellow flower heads above feathery silver-grey foliage. A classic combination plant — the cool yellow works with almost everything and the foliage looks good even out of flower.

Stachys byzantina 'Silver Carpet'

A non-flowering form grown purely for its dense, silver-felted foliage. Superb as a weed-suppressing edging plant in a hot, dry border. The woolly leaves are perfectly adapted to reflect heat and reduce water loss.

Sedum 'Herbstfreude' (Autumn Joy)

The classic late-season sedum. Flat heads of dusty pink flowers from August to October that deepen to copper-red as they age. Succulent foliage looks good all season and the dried seedheads are beautiful through winter.

Geranium sanguineum 'Album'

A refined, white-flowered form of the bloody cranesbill. Surprisingly drought tolerant once established, with attractive deeply-cut foliage that turns red in autumn. Long flowering period from May to August.

Geranium 'Rozanne'

Possibly the longest-flowering hardy geranium available. Violet-blue flowers with a white eye from June right through to the first frosts. Sprawls attractively through other plants and is remarkably resilient in dry conditions once its roots are down.

Eryngium planum 'Blaukappe'

Steel-blue thistle-like flowers and bracts from July to September. Architectural and striking, particularly effective in gravel gardens or combined with ornamental grasses. Bees love it.

Knautia macedonica

Deep crimson pincushion flowers on wiry stems from June to September. Self-seeds gently and weaves through neighbouring plants in a naturalistic way. Thrives in poor, dry soils where lusher plants would struggle.

Tips for Planting a Drought Tolerant Border

• Improve drainage first. Most drought tolerant plants hate sitting in wet soil over winter far more than they dislike summer dryness. Incorporate grit or sharp sand into heavy clay soils before planting.
• Plant in autumn or early spring. This gives roots time to establish before the heat of summer arrives.
• Mulch generously. A 5–7cm layer of gravel or bark mulch around plants reduces evaporation significantly and keeps roots cooler.
• Water in, then step back. New plants need regular watering for their first season. After that, most drought tolerant perennials are best left to fend for themselves — overwatering can actually weaken their drought resistance.
• Group plants with similar needs. A dedicated dry border or gravel garden makes maintenance far simpler and looks more intentional.

Building Your Drought Tolerant Border

If you're starting from scratch, our Build Your Border tool can help you put together a planting scheme that works for your space, soil, and style. We've curated combinations that look great together and share similar growing requirements — so your border works as a whole, not just plant by plant.

Other Plants Worth Considering

Beyond our featured picks, there's a wide world of drought tolerant plants to explore. Verbena bonariensis brings tall, airy purple flowers that self-seed freely through a planting, adding lightness and movement from midsummer to autumn. Artemisia 'Powis Castle' is one of the finest foliage plants for a dry border — its finely cut, silver-grey leaves are aromatic and provide a cool, luminous contrast to stronger flower colours all season long. Calamintha nepeta 'Blue Cloud' is a quietly beautiful plant, producing a haze of tiny lavender-blue flowers from July to October that bees find irresistible; it thrives in poor, dry soils and self-seeds gently without becoming a nuisance. Stachys byzantina 'Silver Carpet' deserves a mention here too — its dense, felted silver foliage is one of the best weed-suppressing edging plants for a hot, sunny spot.

Ornamental grasses such as Stipa, Festuca, and Pennisetum add movement and texture with almost no maintenance. Lavender and Nepeta (catmint) are indispensable for sunny edges and path borders. Alliums provide early-season structure and their dried seedheads persist for months. Crocosmia, Agapanthus, and Libertia all cope well in drier conditions once established. And for ground cover, Ajuga, Alchemilla mollis, and low-growing Thymus varieties are all worth a place in a water-wise garden.